Featured Research

from universities, journals, and other organizations

Simple and inexpensive process to make a material for carbon dioxide adsorption

Date:
June 17, 2013
Source:
Ulsan National Institute of Science and Technology(UNIST)
Summary:
Researchers in South Korea have developed a novel, simple method to synthesize hierarchically nanoporous frameworks of nanocrystalline metal oxides such as magnesia and ceria by the thermal conversion of well-designed metal-organic frameworks.

Shown at left is a TEM image of np-MgO-500. At the right is the schematic view of the direct conversion from aph-MOG to np-metal oxide by heating under nitrogen atmosphere.
Credit: UNIST

Researchers from Ulsan National Institute of Science and Technology (UNIST), S. Korea, developed a novel, simple method to synthesize hierarchically nanoporous frameworks of nanocrystalline metal oxides such as magnesia and ceria by the thermal conversion of well-designed metal-organic frameworks (MOFs).

The novel material developed by the UNIST research team has exceptionally high CO2 adsorption capacity which could pave the way to save the Earth from CO2 pollution.

Nanoporous materials consist of organic or inorganic frameworks with a regular, porous structure. Because of their uniform pore sizes they have the property of letting only certain substances pass through, while blocking others. Nanoporous metal oxide materials are ubiquitous in materials science because of their numerous potential applications in various areas, including adsorption, catalysis, energy conversion and storage, optoelectronics, and drug delivery. While synthetic strategies for the preparation of siliceous nanoporous materials are well-established, non-siliceous metal oxide-based nanoporous materials still present challenges.

A description of the new research was published (Web) on May 7 in the Journal of the American Chemical Society.

Leading the research team was married couple Hoi Ri Moon and Sang Hoon Joo, both assistant professors at UNIST, who contributed to synthesizing nanoporous metal oxides and characterizing nanoporous materials respectively. Fellow authors include Tae Kyung Kim, Kyung Joo Lee, Jae Yeong Cheon and Jae Hwa Lee from UNIST.

The UNIST research team used MOFs based on aliphatic carboxylate ligands which are thermally less stable and much more labile than aromatic ligands. Specifically, the aliphatic ligand is adipic acid, which is a precursor for the production of nylon, and thus very important from an industrial perspective and low in price. During the thermolysis of a crystalline, aliphatic carboxylate ligand-based MOF (aph-MOF), the ligands were transformed into organic moieties via chemical decomposition, and were confined as vesicles in the solids.

The organic vesicles acted as self-generated porogens, which later were converted into nanopores; they also prevented aggregation of the metal oxide nanocrystals. Finally, upon thermolysis at higher temperature, the confined organic moieties evaporated, generating highly porous nanostructures comprising nanocrystalline metal oxides. The control of the retention time and the evaporation rate of the organic moieties in the host solid were critical for the successful formation of nanoporous metal oxides with nanocrystalline frameworks. The thermal treatments converted the Mg-aph-MOF into 3-dimensionally nanoporous MgO frameworks instead of discrete MgO nanoparticles embedded in a carbon matrix. Significantly, nanoporous MgO exhibited exceptional CO2 adsorption capacity (9.2 wt %) under conditions mimicking flue gas.

"I believe MOF-driven strategy can be expanded to other nanoporous monometallic and multimetallic oxides with a multitude of potential applications, especially for energy-related materials" said Prof. Moon. "Because of its high CO2 adsorption capacity, it will open a new way for environmental solutions."

"Various metal oxides converted from well-designed MOFs are being studied as fuel cell catalysts, also" said Prof. Joo, explaining his future research plan.

This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology.


Story Source:

The above story is based on materials provided by Ulsan National Institute of Science and Technology(UNIST). Note: Materials may be edited for content and length.


Journal Reference:

  1. Tae Kyung Kim, Kyung Joo Lee, Jae Yeong Cheon, Jae Hwa Lee, Sang Hoon Joo, Hoi Ri Moon. Nanoporous Metal Oxides with Tunable and Nanocrystalline Frameworks via Conversion of Metal-Organic Frameworks. Journal of the American Chemical Society, 2013; 130507145153005 DOI: 10.1021/ja401869h

Cite This Page:

Ulsan National Institute of Science and Technology(UNIST). "Simple and inexpensive process to make a material for carbon dioxide adsorption." ScienceDaily. ScienceDaily, 17 June 2013. <www.sciencedaily.com/releases/2013/06/130617104616.htm>.
Ulsan National Institute of Science and Technology(UNIST). (2013, June 17). Simple and inexpensive process to make a material for carbon dioxide adsorption. ScienceDaily. Retrieved September 14, 2014 from www.sciencedaily.com/releases/2013/06/130617104616.htm
Ulsan National Institute of Science and Technology(UNIST). "Simple and inexpensive process to make a material for carbon dioxide adsorption." ScienceDaily. www.sciencedaily.com/releases/2013/06/130617104616.htm (accessed September 14, 2014).

Share This



More Matter & Energy News

Sunday, September 14, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Frustration As Drone Industry Outpaces Regulation In U.S.

Frustration As Drone Industry Outpaces Regulation In U.S.

Newsy (Sep. 14, 2014) U.S. firms worry they’re falling behind in the marketplace as the FAA considers how to regulate commercial drones. Video provided by Newsy
Powered by NewsLook.com
Smart Gun Innovators Fear Backlash From Gun Rights Advocates

Smart Gun Innovators Fear Backlash From Gun Rights Advocates

Newsy (Sep. 14, 2014) Winners of a contest for smart gun design are asking not to be named after others in the industry received threats for marketing similar products. Video provided by Newsy
Powered by NewsLook.com
Scientists Have Captured The Sound Of An Atom

Scientists Have Captured The Sound Of An Atom

Newsy (Sep. 12, 2014) Scientists have captured the sound of a single atom by measuring its vibrations. We can't hear it, but it's reportedly the faintest sound possible. Video provided by Newsy
Powered by NewsLook.com
Solar Flare Surges Off Sun

Solar Flare Surges Off Sun

Reuters - US Online Video (Sep. 11, 2014) NASA captures video of a significant flare surging off the sun. Jillian Kitchener reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

    Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins